In this research we discuss an approach for signal selection-separation by using distance. We introduce term distance filter, method for its analysis is applied. Expression for the distance filter characteristic approximation has been found. By using of technique to be presented in this paper the problem of estimation of number of interferences at the receiver input has been solved.
Vladimir B. Trigubovich,
"Estimation of selective properties of distance separation", Proc. SPIE 5445, Microwave and Optical Technology 2003, (7 April 2004); doi: 10.1117/12.560889; https://doi.org/10.1117/12.560889